Hats /helmets that didn't make you look like Londo from Babylon 5. Or to put it another way, DEATH TO THE SIDEWAYS HEADFIN!
Earlier moddable helmets for all classes and armor weights.
More Adaptive moddable patterns.
Low level Trooper armor that looks like armor, rather than a sweatsuit for the New Orleans Saints.
As to jedi-sith robes, how about an option in the character customization box that says 'Hood Up / Down' AND 'Legs Pants or Skirts'?
More helmet or hat options for Smugglers.
A Barber Shop, where you can change hair style and add scars / tattoos.
The ability to give your companion your mod armor as a hand-me-down in certain common sense situations. For example, the Trooper should be able to give Aric Jorgan orange moddable gear for 'Trooper or Jedi Knight' [such as the Republic Trooper set] or Kaliyo wearing Imperial Agent medium gear. Obviously, the same logic wouldn't work for the droids or companions who are restricted in their armor choices, like the Bounty Hunter's Mako.